Download Unitary (UNT) Controller 1100 Series User`s Guide

Table of Contents
Unitary (UNT) Controller 1100
Series User’s Guide
Using this Guide ........................................................1-1
Chapter 1
Introduction...................................................................................................... 1-1
Key Concepts................................................................................................... 1-2
Chapter Organization .....................................................................................................1-2
Chapter 2
Introduction to the UNT1100 Series ..................................2-1
Introduction...................................................................................................... 2-1
Key Concepts................................................................................................... 2-2
UNT1100 Series Operation............................................................................................2-2
Related Information........................................................................................................2-4
Standards Compliance...................................................................................................2-4
Chapter 3
Configuring the UNT1100 Series .......................................3-1
Introduction...................................................................................................... 3-1
Key Concepts................................................................................................... 3-2
HVAC PRO Configuration Tool ......................................................................................3-2
Bench Testing ................................................................................................................3-2
Procedure Overview........................................................................................ 3-3
Detailed Procedures........................................................................................ 3-4
Defining a UNT1100 in a Metasys Network ...................................................................3-4
© Johnson Controls, Inc.
www.johnsoncontrols.com
2
UNT Controller
Defining a UNT1100 in N30 Software ............................................................................3-7
Chapter 4
Installing the UNT1100 Series............................................4-1
Introduction...................................................................................................... 4-1
Key Concepts................................................................................................... 4-2
Design Considerations ...................................................................................................4-2
Tools Needed for Installation .........................................................................................4-2
Environmental Information .............................................................................................4-3
Controller Physical Dimensions .....................................................................................4-3
Power Line Wiring Transient Noise Precautions............................................................4-3
I/O and Communications Wiring Transient Noise Precautions ......................................4-4
Detailed Procedures........................................................................................ 4-6
Mounting the UNT in an Enclosure Kit ...........................................................................4-6
Installing the UNT1100 in an AS-ENC100-0 Enclosure Kit ............................................4-6
Installing the UNT1100 in an EWC10 Enclosure Kit ......................................................4-7
Troubleshooting .............................................................................................. 4-8
Tools Needed.................................................................................................................4-8
Installation Checkout......................................................................................................4-8
Isolation and Grounding UNT1100 Series without an Earth Ground Connection ..........4-9
Chapter 5
Wiring the UNT1100 Series ................................................5-1
Introduction...................................................................................................... 5-1
Key Concepts................................................................................................... 5-2
Power Source and Loads...............................................................................................5-2
Wiring Precautions .........................................................................................................5-4
Grounding and Isolation for UNT1100 ...........................................................................5-5
Terminal Designations ...................................................................................................5-9
Analog Inputs ...............................................................................................................5-13
Binary Inputs ................................................................................................................5-15
Binary Outputs (Relay Jumper Information) .................................................................5-15
Analog Outputs ............................................................................................................5-16
Zone Bus......................................................................................................................5-16
Wiring to Unit Mounted Controls—UNT1100 ...............................................................5-16
Table of Contents
3
Wiring to RLY050/002 Relays ......................................................................................5-16
Wiring Sensors and Actuators......................................................................................5-18
Detailed Procedures...................................................................................... 5-23
Connecting HE-6300 Humidity Sensor ........................................................................5-23
Troubleshooting ............................................................................................ 5-24
Internal Thermal Protection..........................................................................................5-24
Chapter 6
Downloading and Commissioning the UNT1100 Series..6-1
Introduction...................................................................................................... 6-1
Key Concepts................................................................................................... 6-2
Commissioning Procedures ...........................................................................................6-2
Troubleshooting .............................................................................................. 6-3
Chapter 7
Ordering the UNT1100 Series ............................................7-1
Introduction...................................................................................................... 7-1
Key Concepts................................................................................................... 7-2
Ordering Information for Johnson Controls ....................................................................7-2
Ordering Information for Outside Vendors .....................................................................7-5
Specifications .................................................................................................................7-7
Appendix A
Application Examples..................................................... A-1
Introduction..................................................................................................... A-1
Key Concepts.................................................................................................. A-2
Fan Coil......................................................................................................................... A-2
Unit Vent ....................................................................................................................... A-4
Packaged Rooftop......................................................................................................... A-6
Heat Pump .................................................................................................................... A-8
Lead/Lag Pump Sequence.......................................................................................... A-10
Appendix B
Precautions for Rooftop Installations ........................... B-1
Introduction..................................................................................................... B-1
4
UNT Controller
Key Concepts.................................................................................................. B-2
Environmental Information ............................................................................................ B-2
Electrical Noise in Rooftop Units................................................................................... B-2
Considerations for Gas Ignitions ................................................................................... B-2
Considerations for Specific Rooftop Units..................................................................... B-5
Procedure Overview....................................................................................... B-7
Detailed Procedures....................................................................................... B-8
Installing a UNT1100 in a Rooftop Unit......................................................................... B-8
Application Specific Controllers Technical Manual
Chapter 1
Using this Guide
Introduction
The Unitary (UNT) Controller 1100 Series User’s Guide provides
information about how to use the UNT1100 series controller. This
chapter outlines the guide’s organization and content.
©
January, 2001 Johnson Controls, Inc.
Code No. LIT-63630831
www.johnsoncontrols.com
1-1
1-2
UNT Controller
Key Concepts
Chapter Organization
Each chapter of this Unitary (UNT) Controller 1100 Series User’s
Guide is divided into five sections as described in Table 1-1.
Table 1-1: Chapter Organization
Section
Description
Introduction
Briefly outlines the contents of the chapter.
Key Concepts
Describes background information necessary
to perform or understand specific tasks.
Procedure Overview
Describes general steps for performing the
tasks described in the Detailed Procedures
section.
Detailed Procedures
Describes in detail the steps needed to
complete specific tasks described within the
chapter. This section is geared toward users
who are new to the UNT1100 controller.
Troubleshooting
Presents potential problems and solutions.
If a particular section is not needed for a chapter, it is not included.
For example, in this chapter, the Detailed Procedures section is not
required.
Application Specific Controllers Technical Manual
2-1
Chapter 2
Introduction to the UNT1100
Series
Introduction
The UNT1100 Series is an electronic device for digital control of
packaged air handling units, unit ventilators, fan coils, heat pumps, and
other terminal units serving a single zone or room. It also can be
configured as a generic Input/Output (I/O) device for basic point
monitoring applications when used within a Metasys® Network. This
chapter gives an overview of the product.
©
January, 2001 Johnson Controls Inc.
Code No. LIT-63630832
www.johnsoncontrols.com
2-2
UNT Controller
Key Concepts
UNT1100 Series Operation
You can easily configure point inputs and outputs, and software
features to control a wide variety of Heating, Ventilating, and Air
Conditioning (HVAC) equipment applications. The UNT1100 may be
used as a standalone controller or connected to the Metasys Network
through a Network Control Module (NCM), N30, N31, or
Companion™ supervisory controller.
BO OUT W 3
Jumper
Options
W4
AO1
A OCM
When connected to the Metasys Network, the UNT1100 provides all
point control information to the rest of the network. The devices
communicate through an N2 Bus. For a smaller facility, the UNT1100
can function as a standalone controller. Figure 2-1 is an example of the
UNT1100 Series controller.
W8
W9
W 14 W 18
W 20 W 23
W 28 W 29 W 30 W 34 W 35 W 39 W 40 W 41 W 44
A O4
A OCM
A O3
A OCM
AO2
A OCM
W 45 W 50 W 51 W49
W56
OPEN
AO2
AO3
AO4
Jumper
Jumper
Jumper
Jumper
BO4
BO3
BO2
BO1
W52
W55
COM
AO1
24VAC
SRC
SRC
PWR
Job Information
N2 Address
N2 +
N2 Re f
AI Switches
RECV XMIT
1
2
4
8
16
32
64
1 28
R
123 45 678
OPEN
(UP)
AS-UNT11xx
ADDR 0 = ALL OPEN
PWR IN: 24VAC, 2AMP, CLASS 2
BIN OUT: 24VAC, 2A, CLASS 2, PILOT DUTY
AI6
RY10029 Rev J
AICM
AI6
AICM
AI5
AI5
AI4
W6
AICM
W5
AI4
AICM
AICM
W2
AI3
AI3
AICM
W1
AI2
AI2
AI1
AI1
R
CTS 206-6 TB40
CTS 206-6 TB40
O1 2 3 4 5 6
N
O1 2 3 4 5 6
N
W 25 W 26 W 27 W 31 W 32
B I7
B I SRC
B I4
BI6 BI7
B I6
B I SRC
B I2
B I3
B I1
BI1 BI2 BI3 BI4
B I SRC
ZBUS
B I SRC
W 17 W 21 W 22
+ 15V DC
W 16
COM
W 12 W 15
+ 15V DC
W 10 W 11
W 36 W 37 W 38 W 42 W 43 W 46 W 47 W 48 W 53
UNT1100b
Figure 2-1: UNT1100 Controller
Introduction to the UNT1100 Series
2-3
You can use the UNT1100 for unit ventilator, rooftop, heat pump, or
fan coil applications, or as a generic I/O multiplexer and I/O sideloop
control. Each has a different sequence of operation, all of which are
covered in the HVAC PRO User’s Manual (FAN 637.5).
The UNT1100 Series is available in different hardware sets to suit
different application needs. Table 2-1 lists the common features of the
different hardware sets. Table 2-2 lists the differences by model.
Table 2-1: UNT1100 Series Hardware Characteristics Similarities Among Models
Characteristic
Description
6 Analog Inputs
•
RTD temperature elements (1000 ohm nickel,
platinum, or silicon)
•
Adjustable 0 to 2k ohm setpoint potentiometers
•
0 to 10 VDC or 0 to 2 VDC transmitters
•
(6) 24 VAC input
•
Momentary pushbutton from Zone Sensor for
temporary occupancy mode (BI5)
•
BI 4 may be used as an accumulator input for
frequencies less than 2 Hz.
6 Binary Inputs
N2 Bus
Isolated
Zone Bus
•
Light-Emitting Diode (LED) Indication
•
8-pin phone jack on controller
•
Removable screw terminal block
Operating
Temperature Rating
-40 to 60°C (-40 to 140°F)
I/O Terminations
Quick Connects (Spade Lugs)
24 VAC Power in
Termination
Quick Connects (Spade Lugs)
Table 2-2: UNT1100 Series Hardware Characteristics —
Differences Among Models
Characteristic
UNT1108
UNT1126
UNT1144
Analog Outputs:
0 to 10 VDC @ 10 mA
None
2
4
Binary Outputs:
2A 24 VAC Pilot Relays
SPDT (Single-Pole,
Double-Throw)
8
6
4
2-4
UNT Controller
Related Information
Table 2-3 describes where to find information on items related to the
UNT1100 Series.
Table 2-3: Related Information
Description
Document
Sales and Marketing
Information
Unitary Controller (UNT) 1100 Series Product
Bulletin (LIT-635066) in the Metasys Network
Sales Resource Manual (FAN 635)
Using HVAC PRO™ Software
HVAC PRO User’s Manual (FAN 637.5)
Using the Operator Workstation
Operator Workstation User’s Manual
(FAN 634)
Standards Compliance
The UNT1100 Series complies with the following standards:
•
FCC Part 15, Subpart B, Class A
•
IEEE 472
•
IEEE 587 Category A
•
UL 916, UL 864 (Listed)
•
CSA C22.2 No.205
•
EN50081-1 (EN55011 Class B)
•
EN50082-2 (1995), (EN61000-4-2, EN50140 [1993], EN50204,
EN50141 [1993])
EN61000-4-4, EN50141
•
UL873 (Recognized)
•
UL94-5VA (Enclosure)
Application Specific Controllers Technical Manual
3-1
Chapter 3
Configuring the UNT1100 Series
Introduction
This chapter includes information about configuring the UNT1100
Series controller.
This section describes how to:
©
•
define a UNT1100 in a Metasys Network
•
define a UNT1100 in N30 software
January, 2001 Johnson Controls, Inc.
Code No. LIT-63630833
www.johnsoncontrols.com
3-2
UNT Controller
Key Concepts
HVAC PRO Configuration Tool
All UNT1100 series models require HVAC PRO software
(Release 8.01 or later). This software tool configures, commissions,
uploads, and downloads the UNT1100 Series database. Refer to the
HVAC PRO User’s Manual (FAN 637.5) for more information on
configuring the UNT1100 Series.
Bench Testing
We recommend verifying any new configuration by pulling a sample
of the UNT1100 shipment for bench testing and loading a job
configuration before all the controllers are mounted in the unit
cabinets.
Configuring the UNT1100 Series
3-3
Procedure Overview
Table 3-1: Configuring the UNT1100 Series
To Do This
Follow These Steps:
Define a UNT1100 in a Metasys
Network
In the Metasys Operator Workstation (OWS),
open the Network Map and define the
UNT1100 as a new object. Fill in the blank
UNT1100 Series Definition attribute fields as
required. Click Save to add the object to the
NCM database. Upload the NCM to make an
archive copy of the new object.
Define a UNT1100 in
N30 Software
Refer to the Object Dictionary (FAN 694).
3-4
UNT Controller
Detailed Procedures
Defining a UNT1100 in a Metasys Network
To define a UNT1100 Series device object in a Metasys Network:
1.
Go to the Network Map on the Operator Workstation (OWS) and
double-click a system name.
2.
On the Item menu, click New. The Item New dialog box appears
(Figure 3-1).
3.
Select Type/N2 devices in the Item New dialog box.
Figure 3-1: Item New Dialog Box itemnew
Note:
4.
The Hardware System and Hardware Object text fields are
not used for this object type.
Click OK.
Configuring the UNT1100 Series
5.
Highlight UNT in the Add N2 Device dialog box as shown in
Figure 3-2.
Figure 3-2: Add N2 Device Dialog Box add_n2
6.
Click OK.
7.
Complete the attribute fields in the UNT Definition window as
shown in Figure 3-3.
3-5
3-6
UNT Controller
Figure 3-3: UNT Definition Window definition
Note:
Fill in the blank UNT1100 Series Definition attribute fields
as required. Specify an N2 Device Address from 1 to 254.
You may accept or change the default values in the
remaining attribute fields. Table 3-2 explains the blank
attribute fields. The Operator Workstation User’s Manual
(FAN 634) describes the general procedures for entering and
modifying data.
Table 3-2: Blank UNT1100 Series Object Attributes
Attribute
Description
Entry Values . . .
Object Name
Identifies the object (i.e., UNT1108).
The object name cannot be
duplicated in the system.
1 to 8 alphanumeric
characters
Expanded ID
Further identifies the object
(i.e., Garage Level Heater)
0 to 24 alphanumeric
characters (optional)
Configuring the UNT1100 Series
3-7
8.
On the Item menu, select Save to save the new UNT1100 Series
object and add the object to the NCM database.
9.
Upload the NCM to make an archive copy of the new object.
Refer to Uploading from the NCM in the Advanced User’s Guide
section in the Operator Workstation User’s Manual (FAN 634).
Defining a UNT1100 in N30 Software
To define a UNT1100 Series device object in N30 software, refer to
the Object Dictionary (FAN 694).
3-8
UNT Controller
Application Specific Controllers Technical Manual
4-1
Chapter 4
Installing the UNT1100 Series
Introduction
This chapter describes how to:
©
•
mount the enclosure in an enclosure kit
•
install the UNT1100 in an AS-ENC100-0 Enclosure Kit
•
install the UNT1100 in an EWC10 Enclosure Kit
January, 2001 Johnson Controls, Inc.
Code No. LIT-63630834
www.johnsoncontrols.com
4-2
UNT Controller
Key Concepts
Design Considerations
The number and types of components (sensors and actuators) used
with the UNT1100 varies according to application. Analyze the
proposed installation for logical locations to place these devices, and
draw an inventory based on that study. Information on available
accessory devices is in the Ordering the UNT1100 Series
6363081johnson chapter of this user’s guide.
Decide how close the UNT can be to the air handling equipment, while
still allowing adequate room for installation and maintenance
accessibility. Also consider any existing power sources and
communication lines. Secure the controller vertically to a solid wall or
panel and not to any vibrating surface.
IMPORTANT: Do not mount the UNT1100 near high voltage or
electrically noisy devices. Refer to Appendix B:
Precautions for Rooftop
Installations6363081apndxaenviron.
IMPORTANT: For Underwriter’s Laboratories, Inc.® (UL) 864
installations, You must use only the XFR50 or
XPR100 transformers to power the UNT1100.
(24 VAC power to the BO leads only are excluded
from this requirement.)
Tools Needed for Installation
For a typical installation, you need the following:
•
HVAC PRO software, Release 8.01 or later
•
IBM® PC-compatible laptop computer
•
Microsoft® Windows® AS-CBLPRO-2 (for Zone Bus
downloading, uploading, and commissioning) or MM-CVT101-0
(for N2 downloading, uploading, and commissioning)
•
two screwdrivers (1/8 in. and 1/4 in. flat-blade)
•
drill
•
(optional) AS-ZTU100-1 (Zone Terminal unit)
Note:
The AS-ZTU100-1 supports the AS-UNT11xx models, as
well as previous models of UNT: the AS-UNTxxx-0 and
AS-UNTxxx-1 models.
Installing the UNT1100 Series
4-3
Environmental Information
The installation site of the UNT must meet the following
environmental standards:
•
The atmosphere must be free of explosive vapors and escaping
gases.
•
The atmosphere must be free of exposure to corrosive chemical or
salt vapors that might damage electrical equipment.
•
For UNT1100 controllers, the temperature must be maintained
between -40 and 60°C (-40 and 140°F) with relative humidity
(non-condensing) maintained between 10 and 90 percent.
Controller Physical Dimensions
The UNT1100 Series controllers have the following dimensions:
162 x 157 x 42 mm (6.4 x 6.2 x 1.7 in.) H x W x D (without enclosure)
Allow enough room to install an enclosure and conduit for wiring
terminations to the controller.
Power Line Wiring Transient Noise Precautions
The standard UNT, when powered by any typical Johnson Controls
separate isolation transformer or stepdown transformer, operates
reliably in an electrical environment defined as Location Category A
by the IEEE 587 Standard; that is, when installed more than 30 feet
from electrical distribution panels or major bus and feeder systems in
industrial plants.
IEEE 587 Location Category A power line surge/noise level is
specified at 6 kV, 500A (Normal Mode Ringwave).
4-4
UNT Controller
Surge Levels
The UNT exceeds the Category A specification by meeting these surge
levels as well:
IEEE-587 style Common Mode Pulse
3 kV
IEEE-587 style Normal Mode Pulse
1.5 kV
IEEE-472 style Common Mode Ringwave
1.5 kV
IEEE-472 style Normal Mode Ringwave
500V
When the controller is installed within 9m (30 ft) of electrical
distribution panels or major bus and feeder systems in industrial
plants, you must take further precautions to prevent unwanted
Binary Output (BO) cycling, resetting, or other possible controller
malfunctions. This electrical environment is defined as
Location Category B by the IEEE 587 Standard.
You can prevent electrical noise from adversely affecting the
controller. The UNT meets the following power line surge/noise
standards:
IEEE-587
IEEE-472
Common Mode Pulse
1.5 kV
Normal Mode Pulse
6 kV
Normal Mode Ringwave
6 kV
Common Mode Ringwave
1.5 kV
Normal Mode Ringwave
500V
For more information, refer to Appendix B: Precautions for Rooftop
Installations in this user’s guide.
I/O and Communications Wiring Transient Noise Precautions
The I/O wiring and N2 Bus must be “clean,” without electrical noise
transients from nearby lighting, heavy equipment switching, or
inductive loads being driven.
For the N2 Bus, the Transient Eliminator®, model TE/JC04C12, made
by Advanced Protection Technologies (APT) is recommended. Refer
to the Metasys Network Technical Manual (FAN 636) and the
N2 Communications Bus Technical Bulletin
(LIT-636018)[email protected] for more information.
Installing the UNT1100 Series
4-5
Grounding the UNT1100 with an Earth Ground Connection
An earth ground connection to the common terminal of the UNT1100
series controllers is allowed for the 24 VAC power supply and the
binary output (when set up for high side switching). If this earth
ground connection exists, it must be at the transformer secondary
common terminal only. There should be 0 VAC measured from a
common terminal to earth ground and over 20 VAC from a 24 VAC
terminal to earth ground, when power is applied. If no earth ground
connections were planned for the power supply and/or binary outputs,
and you suspect that an earth ground may exist, use the procedure
described above for the UNT1100 to test for the presence of a ground
loop condition.
4-6
UNT Controller
Detailed Procedures
Mounting the UNT in an Enclosure Kit
To mount the UNT in an enclosure kit:
1.
Position the controller and enclosure on the proposed vertical
mounting surface to ensure that the calculated mounting area is
correct.
Note:
2.
You can make precise distance measurements between
controller terminals and sensor/actuator mounting points on
the air handling equipment if the equipment is in place.
Confirm electrical power source and conduit requirements.
Note:
You can install a UNT1100 in a control panel or in an
AS-ENC100-0 or EN-EWC10-0 enclosure.
3.
Use a flat-blade screwdriver and pliers to remove the necessary
wire passage knockouts { as shown in Figure 4-1.
4.
Position the enclosure firmly against the mounting surface and,
using the predrilled mounting holes, mount it with the appropriate
screws.
Note:
This also applies to remote location packages.
Installing the UNT1100 in an AS-ENC100-0 Enclosure Kit
To install the UNT1100 in an AS-ENC100-0 Enclosure Kit:
1.
Secure the UNT | inside the enclosure kit }, using the
three mounting tabs ~ on the sides of the controller board base.
2.
Attach the enclosure cover  after installing the wiring.
Installing the UNT1100 Series
4-7
Do not use this knockout.
Otherwise, the controller will
be in the way of the wiring.
3
1
4
Top/Bottom
Side
4
2
5
UNT
UNT Enclosure (Cover)
untencl
Figure 4-1: Installing the UNT1100 in an ENC100 Enclosure Kit
Installing the UNT1100 in an EWC10 Enclosure Kit
To install the UNT1100 in an EWC10 Enclosure Kit:
1.
Position the terminals of the UNT toward the low voltage wiring
trough located on the left side of the enclosure.
2.
Align the three mounting holes in the base of the controller with
the holes in the backbone of the enclosure. On the side with
four mounting holes, use the two outside holes for mounting in
the EWC.
3.
Secure the controller with three No. 8 x 1 in. screws. For best
results, use a Plastite® type thread. A thread forming or sheet
metal type thread may also be used.
4-8
UNT Controller
Troubleshooting
Tools Needed
Tools needed for typical troubleshooting include:
•
ASC and N2 Bus Networking and Troubleshooting Guide
Technical Bulletin (LIT-6363003)
•
Digital Multimeter (DMM)
•
100k ohm resistor
•
(optional) Double banana plug (see Figure 4-2; available from a
local electronics store or ITT Pomona Stock No. 34F856 or
34F845), 100k ohm 1/4-watt resistor for earth ground voltage tests
100k ohm, 1/4-watt
Use double banana plug for all tests that require
a 100k ohm resistor placed in parallel with DMM.
Steps:
1. Connect 100k ohm resistor under plug's prongs.
2. Insert banana plug into DMM.
3. Connect leads of DMM into banana plug.
banana
Figure 4-2: Double Banana Plug Used with
100k Ohm Resistor
Installation Checkout
Review the mounted UNT1100 and compare it with the appropriate
illustrations in the Detailed Procedures section in this chapter to
ensure proper installation. Also, refer to the engineering drawings
supplied for the individual site. Check the following:
•
the mounting screws holding the subassembly onto the base frame
are secure
•
accessory equipment is connected and labeled correctly
•
the controller terminal connections are secure
•
if applicable, the N2 connections are secure and labeled correctly
•
the UNT switches are appropriately positioned (refer to the Wiring
the UNT1100 Series chapter of this user’s guide)
•
there are no unwanted earth ground connections to the controller
Installing the UNT1100 Series
4-9
Although a single earth ground connection to the common terminal of
UNT1100 series controllers is allowed, you may not want to have one.
The procedures described in the following directions may be used
when no earth ground connections to the UNT are intended or to
ensure that there is only one earth ground connection.
Isolation and Grounding UNT1100 Series without an Earth Ground
Connection
The following tests are not required, but are recommended to reduce
installation errors. To ensure proper isolation within your system, test
the following:
•
field device wiring for proper isolation
•
transformer for isolation and correct polarity termination
•
connected field devices, transformer, and UNT for proper isolation
4-10
UNT Controller
Application Specific Controllers Technical Manual
5-1
Chapter 5
Wiring the UNT1100 Series
Introduction
This chapter includes information about wiring the UNT1100 Series
controller, and details the special precautions and grounding procedures
you must observe when installing the controller.
!
WARNING: Risk of Electric Shock. Disconnect power supply before
making electric connections. Contact with components carrying hazardous
voltage can cause electric shock and may result in severe personal injury or
death.
©
September, 2004 Johnson Controls, Inc.
www.johnsoncontrols.com
5-2
UNT Controller
Key Concepts
Power Source and Loads
The power transformer used must comply with:
•
CSA 22.2 No. 205
•
NEMA ICS 2, Part 2, 230
The power to each UNT1100 is from a Class 2 transformer. A Class 2
transformer must be limited to 4 amperes or less. However, if you use
one low voltage power trunk to power multiple controllers, follow
these precautions:
•
Ensure that polarity is maintained at each 24 VAC connection.
•
Enclose 24 VAC power trunks with greater than 4 amperes
(100 VA) in conduit as required by the National Electric Code
(NEC).
•
Do not share a UNT’s power transformer with a Companion Panel
or any other device with a full-wave rectifier in its power supply.
(UNTs use “half-wave” rectification. Half-wave circuitry and
full-wave circuitry must not share the same transformer.)
•
Consider all the actual loads as well as the basic load of the
controller when determining the system load. 10 VA is listed as the
power draw for the controller alone.
•
Only 2-5 UNTs can be powered from one 100 VA low voltage
power limited, Class 2 transformer. The number of UNTs per
transformer varies, depending on power requirements of the valve
actuators and relays (see Table 5-2). A 40 VA transformer is limited
to two UNTs maximum.
•
The M100 or M9220 actuators draw 20 VA each. We recommend
that each M100/M9220 use its own 24 VAC transformer.
•
The NEC requires that the secondary common of the stepdown
transformer be connected to earth ground on units powered by
greater than 150 VAC.
•
Low line conditions, 20 VAC or less, can result in unreliable
controller operation. It is important to ensure that adequate source
power is delivered to the device when all loads are energized.
Wiring the UNT1100 Series
•
5-3
Any individual binary output (relay) drives up to 2 amperes at
24 VAC. You must limit the power draw of a controller and its
loads to avoid heat dissipation problems.
The total 24 VAC power draw of a UNT installed in an ENC100 or
similar size box must be limited to a maximum of 40 VA.
The total 24 VAC power draw of a UNT mounted in an open air
environment must be limited to a maximum of 75 VA.
•
When the binary outputs are used to source an inductive load (for
example a contactor, starter, or other coil), the common for the load
typically is connected to the common for the controller. This creates
a current path for large inductive spikes to be coupled directly into
the control circuitry of the UNT.
Consider using a separate transformer for inductive loads. If this is
not possible, surge protection such as the AS-MOVKIT-0 or
Electrocube™ surge suppression device P/N RG1782-6 or
RG2031-6, must be installed across the coil to prevent misoperation
of the unitary controller.
Table 5-1 assists you in determining the total 24 VA power draw of
your system.
Table 5-1: UNT1100 Power and Load Specifications
System Loads
Power Draw
UNT1100 with Sensors/Transmitters
10 VA (400 mA)
BO Load
Refer to specific
product
documentation or
Table 5-2.
Relay, Contactor, Solenoid, Actuators*
Maximum allowable load for any individual BO
(relay) is 48 VA (2 amperes at 24 VAC) at a
power factor between 0.6 and 1.0.
Minimum required load for each BO (relay)
used is 0.24 VA (10 mA at 24 VAC) or
10 mA at 10 to 28 VDC. *
AO Load – Actuator (included in the 10 VA power draw of the UNT)
Maximum allowable load for each AO is
10 mA @ 10 VDC with a minimum load
resistance of 1,000 ohms.
Zone Terminal or CBLPRO
1.2 VA (50 mA)
* Relays come with gold flash contacts. If ever used for high currents, the gold
flash is burned off and the minimum levels (10mA) shown above are no longer
valid. Low voltage/low current outputs must remain low voltage low current.
You can use one 24 VAC power trunk to power multiple UNT1100s. In
this case, transformers of up to 100 VA should be centrally located and
the secondary wiring can be run without conduit.
5-4
UNT Controller
Note:
The 24 V power transformer must be UL/CSA listed as NEC
Class 2 Power Limited. See NEC Article 725/Class 2 (30 VRMS
maximum) and (100 VA maximum).
The UNT1100 draws 10 VA without actuators or other loads. The
number of UNT1100s per transformer is dependent on the binary
output loads and actuators. The actuators and relay loads must be added
to the 10 VA of the controller, then divided into the 100 VA
transformer power.
For example, the UNT1100 draws 10 VA without loads. If there were
two VA-8020 valve actuators per UNT1100, its 8 VA (4 VA times 2)
must be added to the UNT1100 for a total of 18 VA. Then five
UNT1100 with two VA8020’s each could be powered from one
100 VA transformer. As more loads are added to each UNT, the
100 VA transformer may only power one or two UNTs. When you use
a 40 VA transformer, the limit is two UNTs but the same rules apply.
Table 5-2 shows the power rating for each valve actuator. The actuator
power plus the UNT1100 power must not exceed 100VA. If a device is
not listed in the following table, refer to the product literature for the
specific device.
Table 5-2: Actuator VA Power Rating
Actuator
VA-8020
VA-8050
VA-8090
J Series Electric Zone Valve
VA-8122
VA-8052
VA-8092
VA-7450
VA-7452
VA-7050
VA-7310
VA-7312
VA-7010
VA-7152
VA-7202
M120, M140, M150
M110, M130
M9100
M9200
Type
Incremental
Incremental
Incremental
On/Off
Voltage (0 to 10 VDC)
Voltage (0 to 10 VDC)
Voltage (0 to 10 VDC)
Lighting relay
Incremental
Voltage (0 to 10 VDC)
Thermal (DAO)
Incremental
Voltage (0 to 10 VDC)
On/Off
Proportional
Proportional
Non-spring Return
Voltage (0 to 10 VDC)
Spring Return
Non-spring Return
Voltage (0 to 10 VDC)
Non-spring Return
Voltage (0 to 10 VDC)
Power Rating
4 VA
6 VA
76 VA
7 VA
4 VA
6 VA
6 VA
42 VA for 50 ms*
2.5 VA
2.5 VA
3 VA
2 VA
2 VA
7 VA
4.7 VA
705 VA
20 VA
25 VA
7.5 VA
12 VA
M9220
20 VA
* Do not schedule all lights on one transformer to turn on at the same time. The
current surge on the transformer could open the circuit breaker.
Wiring the UNT1100 Series
5-5
Power Wiring Layout
When you use a single transformer to supply 24 VAC to multiple
UNT1100s, use wire gauge large enough for the load. The voltage drop
on the 24 VAC cabling is much larger than for line voltage wiring for
the same power draw. For example, a 100 VA (equivalent to 100 watt)
load at 120 VAC consumes only 0.8 amperes. However, at 24 VAC,
you need 4 amperes. Current draw determines the wire size. Therefore
a 100 VA load requires 88 feet of 14 AWG (140 cable feet needs
12 AWG and 222 feet needs 10 AWG) with all loads at one end.
To handle the large wires, two connection methods are available: spade
lugs or optional screw terminals. Individual spade lugs accept a single
10 to 22 AWG/4 mm² to 0.8 mm wire and still fit on 1/4 inch/6 mm
tabs. When two wires are crimped into one spade lug, a larger spade lug
barrel is needed, or a wire nut could connect two heavy wires to a short
6 inch/150 mm-thinner wire.
Optional screw terminals can be assembled over the spade lugs
(Table 5-3). The screw terminals accept up to a single 12 AWG/4 mm²
wire or two 14 AWG/2.5 mm² wires.
Table 5-3: Optional Screw Terminals
Option
Description
Screw Terminal Kit
AP-TBK1002-0: Removable 2-position screw
terminal kit (100 pcs)*
AP-TBK1003-0: Removable 3-position terminal kit
(100 pcs)*
AP-TBK4N2-0: Replacement N2 Bus 4-position
screw terminal kit (10 pcs)
*
Terminals fit over the existing I/O spade lugs.
UNT Controller
UNT
UNT
UNT
UNT
UNT
24 VAC
100 VA
UNT
< 88 ft of 14 AWG >
All Eight UNTs are at one end.
100 VA
UNT
< 176 ft of 14 AWG >
UNT
< 176 ft of 14 AWG >
UNT
UNT
UNT
24 VAC
UNT
5-6
Transformer is centered.
Cable_lg
Figure 1: 100 VA Power Cable Lengths
Note: The standard 14 AWG/2.5 mm² cable (top example in
Figure 1) is limited to 88 feet/27 M with six UNT1100s consuming 12
VA each, all at one end of the cable. If the transformer is centered
(bottom example in Figure 1) with three UNT1100s on the left and
three UNT1100s on the right, the distance in each direction can be
increased. This is because the current (and voltage drop) are halved. In
this example, both the left and the right legs could be increased to
176 feet/53 m from the transformer, creating a 352 foot/108m total
length. For longer cable runs at a given wire size, multiple legs can
extend the distance. Four legs would only consume 25 VA per leg, such
that 366 feet per leg or 732 feet end-to-end would work for 14 AWG.
Important: The use of 18AWG cable for 24VAC power is limited to 35 feet at
100 VA with all loads at one end. To increase this distance, use 50 VA at each
end with the transformer centered (100 VA total). In this case up to 140 feet of
18 AWG cable can be used.
Note:
Table 5-4 describes the relationship between cable length and
power at the end of wires.
Wiring the UNT1100 Series
5-7
Table 5-4: Maximum Cable Length for Given Power/Gauge (U.S. Measurements)
Cable Size
10 Gauge
12 Gauge
14 Gauge
Cable Length (Feet)
Power (VA) at
End of Wire
8 Gauge
16 Gauge
18 Gauge
10
3520
2200
1400
20
1760
1110
700
880
550
350
440
275
175
30
1173
740
40
880
555
467
293
183
117
350
220
138
88
50
704
60
587
444
280
176
110
70
370
233
147
92
58
70
80
503
317
200
126
79
50
440
278
175
110
69
44
90
391
247
156
98
61
39
100
352
222
140
88
55
35
Table 5-5: Maximum Cable Length for Power/Wire Gauge (Metric Measurements)
Cable Size
Power (VA) at End of
Wire
4 mm²
2.5 mm²
Cable Length (Meters)
1.5 mm²
10
427
268
168
20
213
134
84
30
142
89
56
40
107
67
42
50
85
54
34
60
71
45
28
70
61
38
24
80
53
34
21
90
48
30
19
100
43
27
17
Wiring Precautions
Follow these precautions when wiring:
•
Make all wiring connections in accordance with the NEC as well as
in accordance with local regulations.
•
Locate equipment and route the wiring so that signal wiring is a
separated from line voltage power wiring.
•
Make all wiring connections to the UNT using only copper
conductors.
•
If the UNT1100 is included in a network, daisy chain the N2.
The use of “Y” or “T” bus topologies without a repeater installed in
the “T” may cause a loss of communications. Do not use wire
smaller than 22 AWG.
5-8
UNT Controller
•
Do not run N2 Bus, Zone Bus, Analog Input (AI), Binary Input
(BI), Analog Output (AO), or Binary Output (BO) wiring in the
same conduit or bundle as line voltage wiring (30 VAC or above),
or wiring that switches power to highly inductive loads such as
contactors, coils, motors, or generators.
Only Shielded N2 Bus wiring can be run in the same bundle or conduit
as 24 VAC power wiring.
Zone Bus, AI, AO, and BI wiring can be run in the same bundle or
conduit, where convenient.
You may have either no earth ground connection, or one earth ground
connection, which must be at the transformer secondary common,
whether one or multiple controllers are powered by the same
transformer.
Grounding and Isolation for UNT1100
You may connect the UNT power transformer secondary directly to
earth ground as shown in Figure 5-2. If you elect to do so, the grounded
side must connect to the common power input terminal of the
controller.
Wiring the UNT1100 Series
Optional Earth
Ground
Optional Earth
Ground
Optional Earth
Ground
Figure 5-2: Wiring Diagram for UNT1100
5-9
5-10
UNT Controller
!
CAUTION: Risk of Property Damage. You may have a maximum of
one single earth ground connection, which must be at the transformer
secondary common, whether one or multiple controllers are powered by the
same transformer. Connection of more than one earth ground could damage
other connected equipment. (Approved 05/04)
Power Transformer Isolation
24 VAC to 24 VAC isolation transformers for UNT1100 Series
controllers are not mandatory.
Load Isolation
There are two methods of isolating the load power supply
(see Figure 5-3):
1. Connect the load transformer to the SRC terminal (after removing
factory jumper from W49 to W52) and one side of the load. Install
the binary output jumper to the SRC position and wire the second
side of the load to either the Normally Open (N.O.), or Normally
Closed (N.C.) output terminal. Multiple outputs can share the same
load transformer.
2. Connect the load transformer to the center terminal of the output
and one side of the load. Install the binary output jumper to the
open position and wire the second side of the load to either the N.O.
or N.C. output terminal.
A separate load transformer may be necessary because of transformer
VA limitations, or may be desirable to completely isolate loads from
the UNT digital circuitry for better noise immunity.
Note:
External noise suppressors are recommended for inductive
loads (AS-MOVKIT-0 or Electrocube™ surge suppression device
P/N RG1782-6 or RG2031-6).
You may connect the UNT1100 power transformer secondary directly
to earth ground. If you elect to do so, the grounded side must connect to
the common input terminal of the controller (W55).
5-11
Wiring the UNT1100 Series
Method 2
Load Transformer
Jumper in
Open Position
Contactor
Method 1
Load Transformer
Unit Power
Transformer
Contactor
Optional
Ground
BO OUT
Jumper
Options
SRC
OPEN
N2 Address
N2+
N 2R ef
Job Information
RECV
XMIT
1
2
4
8
16
32
64
128
AI Switches
12345678
Install Jumper to
SRC Position
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
Loadiso
Figure 5-3: Load Isolation Example Grounding and Isolation for UNT1100 with Separate Load
Transformer
!
CAUTION: Risk of Property Damage. Do not interconnect two Class
2 transformers. Interconnecting two Class 2 transformers in series could
increase the applied voltage to 48 VAC and may result in electric shock.
5-12
UNT Controller
!
CAUTION: Risk of Property Damage. You may have a maximum of
one single earth ground connection, which must be at the transformer
secondary common, whether one or multiple controllers are powered by the
same transformer. Connection of more than one earth ground could damage
other connected equipment. (Approved 05/04)
When you ground one side of the transformer secondary, the grounded
side must connect to the common power input terminal (W55).
Connecting the grounded side of the transformer to the 24 VAC power
input terminal will damage a CBLPRO-1(-0) or laptop.
You may connect the separate load power transformer secondary to
earth ground as long as doing so is compatible with the equipment
being controlled.
Terminal Designations
Terminal points are identified on the front label and circuit board of
each UNT1100 model (Figure 5-4).
You may make connections to the UNT by connecting single wires to
the individual screw or spade terminals. Label and terminal point
identification are different for each UNT1100 model. Table 5-6 and
Table 5-7 identify the terminals.
BO OUT
Jumper
Options
SRC
OPEN
Ref
N2+
N2-
N2 Address
RECV XMIT
1
2
4
8
16
32
64
128
AI Switches Job Information
1 2 3 4 5 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
label1
Figure 5-4: Example of UNT1100 Label
Wiring the UNT1100 Series
5-13
Table 5-6: UNT1100 Terminal Identification (Bottom Terminals Left to Right)
Terminal Identification
UNT1100
Description
W1
AI1
Analog Input 1
W2
AI CM
Analog Input Common
W5
AI2
Analog Input 2
W6
AI CM
Analog Input Common
W10
AI3
Analog Input 3
W11
AI CM
Analog Input Common
W12
AI4
Analog Input 4
W15
AI CM
Analog Input Common
W16
AI5
Analog Input 5
W17
AI CM
Analog Input Common
W21
AI6
Analog Input 6
W22
AI CM
Analog Input Common
W25
+15 VDC
+15 Volts DC Output
W26
+15 VDC
+15 Volts DC Output
W27
COM
24 VAC Common
W31
ZB
Zone Bus
W32
BI SRC
Input Common, 24 VAC
W36
BI1
Binary Input 1
W37
BI SRC
Input Common, 24 VAC
W38
BI2
Binary Input 2
W42
BI3
Binary Input 3
W43
BI SRC
Input Common, 24 VAC
W46
BI4
Binary Input 4
W47
BI6
Binary Input 6
W48
BI SRC
Input Common, 24 VAC
W53
BI7
Binary Input 7
BI SRC signal is 24 VAC Class 2 output.
Binary Input 5 is internal to the controller
5-14
UNT Controller
Table 5-7: UNT1100 Terminal Identification (Top Terminals Left to Right)
Terminal
UNT1108
UNT1126
UNT1144
Description
W3
NO8
AO1
AO1
BO8, Relay Normally Open
AO1 Signal
W4
OUT8
AO CM
AO CM
BO8, Relay Center Contact
AO1 Common
W7
NC8
(space)
(space)
BO8, Relay Normally Closed
(not used)
W8
NO7
AO2
AO2
BO7, Relay Normally Open
AO2 Signal
W9
OUT7
AO CM
AO CM
BO7, Relay Center Contact
AO2 Common
W13
NC7
(space)
(space)
BO7, Relay Normally Closed
(not used)
W14
NO6
NO6
AO3
BO6, Relay Normally Open
AO3 Signal
W18
OUT6
OUT6
AO CM
BO6, Relay Center Contact
AO3 Common
W19
NC6
NC6
(space)
BO6, Relay Normally Closed
(not used)
W20
NO5
NO5
AO4
BO5, Relay Normally Open
AO4 Signal
W23
OUT5
OUT5
AO CM
BO5, Relay Center Contact
AO4 Common
W24
NC5
NC5
(space)
BO5, Relay Normally Closed
(not used)
*
W28
NO4
NO4
NO4
BO4, Relay Normally Open
W29
OUT4
OUT4
OUT4
BO4, Relay Center Contact
W30
NC4
NC4
NC4
BO4, Relay Normally Closed
W34
NO3
NO3
NO3
BO3, Relay Normally Open
W35
OUT3
OUT3
OUT3
BO3, Relay Center Contact
W39
NC3
NC3
NC3
BO3, Relay Normally Closed
W40
NO2
NO2
NO2
BO2 Relay Normally Open
W41
OUT2
OUT2
OUT2
BO2, Relay Center Contact
W44
NC2
NC2
NC2
BO2, Relay Normally Closed
W45
NO1
NO1
NO1
BO1, Relay Normally Open
W50
OUT1
OUT1
OUT1
BO1, Relay Center Contact
W51
NC1
NC1
NC1
BO1, Relay Normally Closed
W52
SRC*
SRC*
SRC*
Jumper Selectable Source Voltage
(factory installed jumper)
W49
24 VAC
24 VAC
24 VAC
High Side of Power Transformer
W56
24 VAC
24 VAC
24 VAC
High Side of Power Transformer
W55
COM
COM
COM
Low Side of Power Transformer
SRC is the Common to all relay out terminals via jumper clips.
Wiring the UNT1100 Series
5-15
Analog Inputs
The six analog input terminals, their power supply, and their common
points occupy the lower left corner of the controller. These inputs are
one of two types: resistive or voltage. A pair of DIP switches
configures the analog input for the desired type.
Use these switches and HVAC PRO software to select the type of
analog input. Use the Temp switch positions for all temperature sensors
and setpoint potentiometers. Use the Voltage positions for all active
voltage transmitters. For humidity applications using 3-wire voltage
transmitters, such as the HE-6300 Series, use the 15 VDC power supply
terminals next to the inputs for AI6. Table 5-8 shows each
configuration.
Table 5-8: Analog Input Configurations
AI Type
Range
Switch Position
Voltage (V)
0 to 2 VDC
SW1 to Off
SW2 to Off
Voltage (V)
0 to 10 VDC
SW1 to On
SW2 to Off
Resistance/
Temperature (T)
1,000 ohm Nickel, Platinum,
Silicon, 2 k ohm potentiometer
SW1 to Off
SW2 to On
5-16
UNT Controller
Setting the Analog DIP Switches
The UNT has one set of DIP switches for configuring the analog input
points. Use Table 5-9 to set analog input DIP switches. Instructions for
setting the N2 Address DIP switches are in the UNT1100 Series
Installation Bulletin (Part No. 24-9534-7).
Analog Input Switches
W3
W4
W8
W9
W 14 W 18
W 20 W 23
W 28 W 29 W 30 W 34 W 35 W 39 W 40 W 41 W 44
A O4
A OCM
A O3
A OCM
AO2
A OCM
AO1
W 45 W 50 W 51 W49
SRC
W56
OPEN
AO2
AO3
AO4
Jumper
Jumper
Jumper
BO4
BO3
BO2
BO1
W52
W55
COM
AO1
Jumper
24VAC
BO OUT
Jumper
Options
A OCM
AI Switches
SRC
PWR
Job Information
N2 Address
N2 +
N2 Re f
AI Switches
RECV XMIT
1
2
4
8
16
32
64
1 28
R
123 45 678
OPEN
(UP)
AS-UNT11xx
ADDR 0 = ALL OPEN
PWR IN: 24VAC, 2AMP, CLASS 2
BIN OUT: 24VAC, 2A, CLASS 2, PILOT DUTY
AI6
RY10029 Rev J
AICM
AI6
AICM
AI5
AI5
AICM
W6
AICM
AI2
W5
AI4
AICM
W2
AI4
AICM
AI1
W1
AI3
AI3
AI2
AI1
R
CTS 206-6 TB40
O1 2 3 4 5 6
N
CTS 206-6 TB40
O1 2 3 4 5 6
N
W 25 W 26 W 27 W 31 W 32
B I7
B I SRC
B I4
B I6
B I SRC
B I3
B I2
B I SRC
BI1 BI2 BI3 BI4 BI6 BI7
B I1
B I SRC
ZBUS
W 17 W 21 W 22
COM
W 16
+ 15V DC
W 12 W 15
+ 15V DC
W 10 W 11
W 36 W 37 W 38 W 42 W 43 W 46 W 47 W 48 W 53
dipswitch
Figure 5-5: Setting the Analog Input DIP Switches
The AI switches are factory set with AI 1, 2, and 3 as resistive inputs,
and AI 4, 5, and 6 as 0 to 10 VDC inputs. You may reconfigure the
switches using Table 5-9. For example, if you connect a 10 VDC input
to AI 4, set SW1-4 to On and SW2-4 to Off.
Table 5-9: Analog Input DIP Switch Settings
Hardware Point
Switch
Temp
(Resistive Input)
SW1
SW2
2 VDC (0 to 2
VDC Input)
SW1
SW2
10 VDC (0 to
10 VDC Input)
SW1
SW2
AI 1
OFF
ON
OFF
OFF
ON
OFF
AI 2
OFF
ON
OFF
OFF
ON
OFF
AI 3
OFF
ON
OFF
OFF
ON
OFF
AI 4
OFF
ON
OFF
OFF
ON
OFF
AI 5
OFF
ON
OFF
OFF
ON
OFF
AI 6
OFF
ON
OFF
OFF
ON
OFF
Wiring the UNT1100 Series
5-17
Binary Inputs
Six binary inputs on the controller are located at the right of the lower
terminal strip.
The binary inputs on the UNT1100 Series controllers are inactive when
open or connected to UNT common. When a binary device closes to
complete a binary circuit, the BI SRC terminal provides the 24 VAC,
which, in turn, activates the input. Binary Inputs 1-4 have an input
threshold between 2.5 and 11.5 VAC (2.9 and 9.0 VDC). Binary
Inputs 6 and 7 have input thresholds between 1.8 and 6.9 VAC (1.8 and
6.0 VDC). Binary Input 4 may be used as an accumulator input for
frequencies less than 2 Hz.
Binary Input 5 is an internal input that detects the Temporary
Occupancy pushbutton on a TE-6700 sensor.
Binary Outputs (Relay Jumper Information)
Binary outputs are relays on the controller hardware. The controller has
four, six, or eight BOs, depending on the model. A typical output
circuit is shown in Figure 5-6.
Each binary output has both Normally Open and Normally Closed
electrically isolated contacts available at the terminal. The Common
point of each Relay may also be independently jumpered to the SRC
terminal, or wired to an external isolated supply. Place the jumper clip
to the SRC (right) position to connect the Relay Common (OUTx) to
the SRC signal. When the jumper clip is placed in the OPEN (left)
position, the relay common must be externally supplied.
24 VAC
24 VAC
SRC
BOx Jumper Clip
SRC
Open
NOx
OUTx
NCx
24 VAC
Factory Installed
Jumper
Output
Load
To Next
BO Circuit
BOjumper
Figure 5-6: Typical Binary Output Circuit
The jumper wire shown in Figure 5-6 is connected to the 24 VAC
terminal and the SRC terminal. The OUTx terminal also can be used
when using a separate load transformer. Remove the BOx jumper clip
on the controller for this application. For important power and load
specifications, see Table 5-1.
5-18
UNT Controller
The terminal labeled SRC on the controller is the internal shared node
of each relay output (see Figure 5-6). When connecting this terminal
(via the wire jumper) to 24 VAC for high side switching, each load
must be connected between the binary output N.O. terminal and the
common terminal of the transformer. When connecting this terminal to
common for low side switching, each load must be connected between
the binary output N.O. terminal and the 24 VAC terminal of the
transformer.
Analog Outputs
The UNT1126 and the UNT1144 have two and four AOs, respectively.
The load connects between the AO and AO common terminals. Each
output generates a proportional voltage output of 0 to 10 VDC to
common. The maximum load for each output is 10 mA with a
minimum 1000 ohm load resistance.
Zone Bus
The Zone Bus provides UNT serial communication connections for
M100C Series actuators, CBLPRO (for HVAC PRO commissioning),
the Zone Terminal (ZT), and the TMZ1600 sensor.
Wiring to Unit Mounted Controls—UNT1100
!
CAUTION: Risk of Property Damage. When connecting an earth
ground on the power transformer secondary, connect only one such ground,
regardless of the number of controllers powered by the transformer.
Connecting more than one earth ground may result in damage to other
equipment connected to the controller.
!
CAUTION: Risk of Property Damage. Connect the earth ground to
the W55 COM terminal of the UNT controller. Connecting the earth ground to
any other terminal may result in damage to equipment connected to the
controller.
Wiring the UNT1100 Series
5-19
Wiring to RLY050/002 Relays
Connect power to the relay module and the transformer through the
conduit knockouts in each box. Wire the module according to
Figure 5-7. For a schematic diagram of the relay module, see the Air
Handling Unit (AHU) Controller Technical Bulletin (LIT-6363010),
Appendix A: AHU Tower, AHU Tower Wiring Details section.
!
WARNING: Risk of Electric Shock. Disconnect power supply before
making electric connections. Contact with components carrying hazardous
voltage can cause electric shock and may result in severe injury or death.
Figure 5-7 shows a UNT1100 wired to an RLY050/002 with all BOs
isolated from earth ground.
5-20
UNT Controller
BO OUT
Jumper
Options
SRC
24 VAC
110 VAC
OPEN
N2 Address
N 2+
N 2R ef
Job Information
RECV XMIT
1
2
4
8
16
32
64
128
AI Switches
1 2 3 45 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
Low
Voltage
High
Voltage
(See
Note 1.)
See Note 3.
COM
NC
NO
A
B
COILS
TRIAC
HAND
HOA
COM
OFF
COM
NC
NO
See Note 5.
AS-RLY050-0 / AS-RLY002-0
Notes:
Note 1: Separate low voltage wiring on the left from line voltage wiring on the right.
Note 2: Hand operation using the H/O/A switch requires common to the COILS
terminal and 24 VAC to the TRIAC terminal to energize the relay.
Note 3: The Hand or Off position signals the binary input connected to those terminals.
These switches can be hardwire "OR"ed and connected to one BI. This
switch uses the HOA COM terminal, which is isolated from the relays.
Note 4: Your application will determine exact connections to UNT.
Note 5: HOA COM must be connected to one of the BI SRC terminals.
Figure 5-7: UNT1100 Wired to RLY050/002 with Electrically Isolated BOs
unt2ahu
Wiring the UNT1100 Series
5-21
You can obtain a Double-Pole, Double-Throw (DPDT) relay
configuration by connecting the BO signal to two terminals on the relay
kit terminal block (for example, B and C). If you require a phone jack
at a remote relay kit, add an AS-CBLCON-0.
Wiring Sensors and Actuators
Use 18 AWG twisted pair wire for all sensor and output wiring.
Shielding is not required. However, if you decide to use it, earth ground
the shield at the transformer. Remember that you may have either no
earth ground connection, or one earth ground connection, which must
be at the transformer secondary common. You may also use 24 AWG
wire in some applications, but maximum wire length will be reduced
due to the increased resistance. To minimize sensor error caused by
field wiring, the total resistance of all resistive sensor wiring should be
less than 3.0 ohms.
Note:
For Nickel and Platinum temperature sensors, a 1°F error
occurs for every 90 feet of 22 AWG cable.
!
CAUTION: Risk of Property Damage. Do not run low voltage cable
in the same conduit or wiring troughs with line voltage wires. Running low and
line voltage wires in the same conduit or wiring troughs may damage the
equipment or cause system malfunction.
Table 5-10: Input and Output Load Impedances
Function
Range
DC Input
Impedance
Sensor or
Load
Impedance
DC Supply
15-18 VDC at 50 mA
N/A
162-10 M ohm
AI Voltage
AI Temperature/
Potentiometer
BI VAC 60 Hz
Inputs
0-2V or 0-10 VDC
1000 ohm Si, Ni, Pt, or 0-2 k ohm
Potentiometer
0-24 VAC, 2.5 V threshold
470 k ohm
3540 ohm
0-5 k ohm
0-2 k ohm
9.8 k (DC) ohm
6.2 k (AC) ohm
0-5 k ohm
N/A
N/A
1 k-10 M ohm
12-48 0 ohm
AO Voltage
BO VAC Relay
Outputs
0-10 VDC @ 10 mA maximum
AC 24 V 2 A maximum, 15 A inrush,
PF=0.6 min
DC 10-28 V 0.5 A maximum
5-22
UNT Controller
Table 5-11: Sensor Wire Sizes and Maximum Lengths
Sensor Type
18 AWG Wire Size Run
Length In Meters (Feet)
24 AWG Wire Size Run
Length In Meters (Feet)
AI Temperature (Resistive)
152.4 m (500 ft)
30.5 m (100 ft)
AI Voltage
152.4 m (500 ft)
30.5 m (100 ft)
BI Voltage/Contact
152.4 m (500 ft)
152.4 m (500 ft)
Single BO at 0.1A*
76.2 m (250 ft)
18.9 m (62 ft)
Single BO at 0.5 A*
15.2 m (50 ft)
3.7 m (12 ft)
Single BO at 2.0A*
3.8 m (12.5 ft)
0.9 m (3.1 ft)
Zone Bus
152.4 m (500 ft)
15.2 m (50 ft)
Zone Thermostat
30.5 m (100 ft)**
Eight Conductor Phone Cable
(6.1 m [20 ft])
* Round trip wire distances shown, assuming 2.8% voltage drop due to cable length and wire gauge.
** If a CBLPRO-2 and a Zone Terminal are used, the cable length must be limited to 15 m (50 ft).
Figure 5-8 shows connections between an M100C motor and the
Zone Bus.
When you connect an M100C actuator to the Zone Bus, we recommend
powering it with a separate 24 VAC transformer. However, you may
use the UNT’s transformer if it is sized to provide the required
additional 20 VA, connected with the correct polarity and run with
18 AWG or thicker wire. See Figure 5-8 for terminal locations when
wiring an M100C actuator.
Wiring the UNT1100 Series
5-23
BO OUT
Jumper
Options
SRC
OPEN
N2 Address
N2 +
N2Ref
Job Information
RECV
XM IT
1
2
4
8
16
32
64
128
AI Switches
12345678
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
! CAUTION: Risk of Property Damage. If
CW
COM
COM
the same transformer is used
for both the UNT and M100
boards, connect the COM
terminal of the UNT to the
T1 terminal of the M100.
Failure to do so may result
in a short circuit and damage
to the transformer.
T1
COM
ZBUS
CCW BUS
24
VAC
T2
Note: When you connect an M100C
actuator to the Zone Bus, we
recommend powering it with a
separate 24 VAC transformer.
M100 Motor with
R81CAA-2 Board
HVAC PRO software
indicates the needed address.
Zone Bus
Address Switch
Set address to 22.
O 123 45678
N
untm100c
Figure 5-8: M100C Motor Zone Bus Connection Using an R81CAA-2 Board
UNT Controller
Temperature Sensors
Figure 5-9 shows the connections between a UNT1100 and a TE-6700
temperature sensor.
BO OUT
Jumper
Options
SRC
OPEN
Job Information
N2 Address
N 2+
N 2R ef
AI Switches
RECV XMIT
1
2
4
8
16
32
64
128
5-24
1 2 3 45 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
TE-6700
1
8
4
5
tempsensor
Figure 5-9: Example of TE-6700 Temperature Sensor Connection
To make all necessary wiring terminations between the UNT and
TE-6700 Series sensor, use phone cable that has pre-terminated 8-pin
RJ-45 connectors. For cable ordering information, refer to Ordering
Information for Outside Vendors in the Ordering the UNT1100 Series
chapter of this user’s guide.
Wiring the UNT1100 Series
5-25
Phone Jack Polarization
Figure 5-10 illustrates the polarization of the 6-pin and 8-pin phone
jacks on the UNT or sensor. Terminal 1 is to the extreme left as you
face the jack opening, tab notch down.
8-pin
6-pin
phonejk
Figure 5-10: Phone Jack Polarization
Table 5-12 defines the pin usage for each jack.
Table 5-12: Phone Jack Pin Identification
8-Pin Jack (UNT1100 Series to
Temperature Sensor)
Pin
Signal
6-Pin Jack (CBLPRO or ZT to
Temperature Sensor)
Pin
Signal
1
AI 3 Heating Setpoint
1
Not Used
2
AI 2 Warmer/Cooler, or
Cooling Setpoint
2
24 VAC
3
AI 1 Temperature Sensor
3
24 VAC/ZnBs Common
4
AI 1 Sensor Common
4
Not Used
5
24 VAC (Class 2) BI SRC
5
Zone Bus
6
24 VAC / ZnBs Common
6
Not Used
7
AI 2/3 Common
8
Zone Bus
When using the TE-6700 sensor, do not move the hardware point
assignments in the HVAC PRO software.
For information on cables, refer to the Ordering Information for
Outside Vendors in the Ordering the UNT1100 Series chapter of this
user’s guide.
5-26
UNT Controller
Detailed Procedures
Connecting HE-6300 Humidity Sensor
To connect an HE-6300 humidity sensor to the UNT1100:
1. Set the analog input DIP switches on the AS-UNTxxx board to
10 volts (Figure 5-11):
2. Switch 1 = ON
3. Switch 2 = OFF
4. Enter the range of the humidity sensor through the HVAC PRO
software (0 to 10 VDC is equal to 0 to 100% RH).
Analog Input Switches
W3
W8
W4
W9
W 14 W 18
W 20 W 23
W28 W 29 W 30 W 34 W 35 W 39 W 40 W 41 W 44
AO4
AOCM
AO3
AOCM
AO2
AOCM
AO1
W 45 W 50 W51 W49
SRC
W56
OPEN
AO2
AO3
AO4
Jumper
Jumper
Jumper
BO4
BO3
BO2
BO1
W52
W55
COM
AO1
Jumper
24VAC
BO OUT
Jumper
Options
AOCM
AI Switches
SRC
PWR
N2 Address
Ref
Job Information
N2+
N2 -
AI Switches
RECV XMIT
1
2
4
8
16
32
64
128
R
123 45 678
OPEN
(UP)
AS-UNT11xx
ADDR 0 = ALL OPEN
PWR IN: 24VAC, 2AMP, CLASS 2
BIN OUT: 24VAC, 2A, CLASS 2, PILOT DUTY
AI6
RY10029 Rev J
AICM
AI6
AICM
AI5
AI5
W6
AICM
W5
AI4
AICM
W2
AI4
AICM
AI2
W1
AI3
AI3
AICM
AI2
AI1
AI1
R
CTS 206-6 TB40
O1 2 34 5 6
N
CTS 206-6 TB40
O1 2 34 5 6
N
W 25 W 26 W 27 W 31 W 32
BI7
BI SRC
BI4
BI6
BI SRC
BI3
BI2
BI6 BI7
BI SRC
BI1 BI2 BI3 BI4
BI1
BI SRC
ZB US
W 17 W 21 W 22
COM
W 16
+15VDC
W 12 W 15
+15VDC
W 10 W 11
W 36 W 37 W 38 W 42 W 43 W46 W 47 W 48 W 53
PWR
COM
OUT
HE-6300
Humidity
Sensor
humsensor
Figure 5-11: Example of HE-6300 Humidity Sensor Connection
Wiring the UNT1100 Series
5-27
Troubleshooting
Internal Thermal Protection
The UNT1100 Series products have internal circuit protection from
accidental shorts or overloads. Any shorted BI_SRC terminal or short
to the 24 VAC, which is available on the 8-pin RJ-45 phone jack, can
cause the circuit protection to trip as current draw on the source
increases with each addition to the load. If the circuit protection device
has opened due to a high current condition, it may be necessary to
remove power to the controller and allow a few minutes for the
protection device to cool.
If the circuit protection device has tripped, the UNT will act as though
no power has been applied. It will not communicate, and it may feel
slightly warm to the touch. Again, it may be necessary to remove power
to the controller and allow a few minutes for the protection device to
cool.
Maximum combined power current of BI_SRC and 24 VAC at phone
jack total ≤ 2.4VA (100 mA).
Application Specific Controllers Technical Manual
6-1
Chapter 6
Downloading and
Commissioning the UNT1100
Series
Introduction
This section describes what you need to know when downloading and
commissioning a UNT1100. This chapter describes:
©
•
commissioning via Zone Bus
•
commissioning via N2 Bus
January, 2001 Johnson Controls, Inc.
Code No. LIT-63630836
www.johnsoncontrols.com
6-2
UNT Controller
Key Concepts
Commissioning Procedures
Commissioning a UNT begins after the unit is mounted and wired, and
the control and hardware/software features have been defined through
HVAC PRO software. Refer to the HVAC PRO User’s Manual
(FAN 637.5) for complete controller configuration and commissioning
information. We recommend a Zone Terminal or laptop Personal
Computer (PC) with HVAC PRO software to perform a complete
system startup procedure. However, these accessories are not required
for the basic procedure detailed in this section.
Via Zone Bus
HVAC PRO software, Release 8.01 or later, allows you to perform
downloading and commissioning via the Zone Bus. This requires using
the CBLPRO interface and a laptop or PC running the HVAC PRO
software. You can connect to the TE-6700 sensor 6-pin connector or
directly at the controller. Communication rate is 1200 baud over the
Zone Bus.
Via N2 Bus
HVAC PRO software, Release 8.01 or later, allows you to perform
downloading and commissioning over the N2 Bus using
MM-CVT101-0, Metasys OWS Release 6.0 or higher, or Companion
Release 6.00 and Controller Access. Because the communication rate
is 9600 baud, performing this process over the N2 Bus saves a great
deal of time when loading the initial configuration files and parameters
into the controller.
Downloading and Commissioning the UNT1100 Series
6-3
Troubleshooting
There are some errors that may occur while using the HVAC PRO
commissioning tool with the UNT1100 Series over the Zone Bus. The
cause of the error is often a loose or improper connection between the
CBLPRO (AS-CBLPRO), laptop PC, and the controller. A defective
COM port on the laptop, or a defective controller could also be at
fault.
Note:
It takes ten seconds for a UNT to reset and resume
communication after being downloaded.
An effective troubleshooting technique is to use a CBLCON and
observe its LEDs, which will indicate the problem. You may also try
exchanging the component that you believe is defective with a
working component of the same type.
A noisy wire adjacent to the Zone Bus can also cause communication
errors. Noise can be periodically induced into the Zone Bus, thereby
causing sporadic communication failures between the laptop and the
UNT. Most often, noisy lines cause intermittent disruption, not total
loss of communication.
For more information on HVAC PRO software, refer to the
HVAC PRO User’s Manual (FAN 637.5).
6-4
UNT Controller
Application Specific Controllers Technical Manual
7-1
Chapter 7
Ordering the UNT1100 Series
Introduction
This chapter lists ordering information for the UNT1100 and related
Johnson Controls products as well as information on ordering
accessories from outside vendors.
©
January, 2001 Johnson Controls Inc.
Code No. LIT-63630837
www.johnsoncontrols.com
7-2
UNT Controller
Key Concepts
Ordering Information for Johnson Controls
This section includes code numbers and descriptions for the
UNT1108/1126/1144 and accessory equipment.
Controllers
Use Table 7-1 to order controllers and accessory equipment.
Table 7-1: UNT1100 and Accessory Equipment
Code
Number
Description
Analog Binary
Input
Input
Analog
Output
Relay
Output
N2
Communication
AS-UNT1108-0
0
8
6
6
AS-UNT1126-0
2
6
6
6
AS-UNT1144-0
4
4
6
6
Sensors/Transmitters
Use Table 7-2 to order controllers and accessory equipment.
Table 7-2: UNT1100 Sensors and Transmitters
Code Number
Description
Type
EP-8000 Series
Electro-Pneumatic
Transducer 0.5 to 19 psig
0 to 10 VDC, High Volume
(relay)
HE-6300 Series
Wall Mount Humidity
Transmitter
12-30 VDC Supply
HE-6310 Series
Duct Mount Humidity
Transmitter
12-30 VDC Supply
HE-6700 Series
Humidity/Temperature
Transmitter (Wall Mount)
Various
TE-6100-11, -12
Series
Zone Temperature Sensor
Nickel, 1000 ohm with
Phone Jack
TE-6300 Series
Temperature Sensor
Nickel, Platinum, Silicon
TE-6700 Series
Zone Temperature Sensor
Series
Resistance
AP-TMZ1600-0
Room Sensor with LCD
Display
Nickel PTC, 1000 ohm
with Phone Jack
Ordering the UNT1100 Series
7-3
Dampers and Valve Actuators
Use Table 7-3 to order controllers and accessory equipment.
Table 7-3: UNT1100 Dampers and Valve Actuators
Code Number
Description
Type
VA-7152 Series
Valve Actuator
0 to 10 VDC Proportional
VA-7202 Series
Valve Actuator
0 to 10 VDC Proportional
VA-8122 Series
Valve Actuator Assemblies
1/2 inch
0 to 10 VDC
VA-8052 Series
Valve Actuator Assemblies
1/2 inch, 3/4 inch, 1 inch, and
1-1/2 inch
0 to 10 VDC
M100C Series
Zone Bus Damper Actuators
Zone Bus Addressable
M100E Series
Standalone Economizer
Actuators
24 VAC Triac
M100G Series
Proportional Damper
Actuators
0 to 10 VDC
M9000-500 Series
Valve Linkage Assembly for
M9100 and M9200 Direct
Mount Actuators
0.5- through 2-inch Globe
Style Valve Bodies
M9100
Direct Mount Proportional
Damper Actuator
0 to 10 VDC
M9200
Direct Mount Proportional
Damper Actuator, Spring
Return
0 to 10 VDC
7-4
UNT Controller
Accessories
Use Table 7-4 to order controllers and accessory equipment.
Table 7-4: UNT1100 Accessories
Code Number
Description
AP-TBK1002-0
Removable 2-position Screw
Terminal Kit (100 pcs)
Type
AP-TBK1003-0
Removable 3-position Screw
Terminal Kit (100 pcs)
AS-CBLPRO-2
HVAC PRO Cable
N/A
AS-ENC100-0
Enclosure for UNT1100
Series (optional)
Sheet Metal
AS-RLY002-0
Relay, 2 SPDT, 5A, 240 VAC
AS-RLY050-0
Relay Kit, 2 SPDT, 5A,
240 VAC with enclosure
AS-RLY100-1
Relay Kit, 4 SPDT, 5A,
240 VAC with enclosure
AS-XFR050-0
Transformer
50 VA, 120 to 24 VAC
AS-XFR010-1
Transformer
100 VA
AS-TBKIT-0
Replacement N2 Bus and
Power Terminal Block
Connectors
Five N2 Bus and
Five Power Terminal
Blocks
AS-ZTU100-1
Zone Terminal *
N/A
EN-EWC10-0
Enclosure for UNT (optional)
UPM Plastic
EN-EWC15-0
Enclosure with 50 VA
Transformer
UPM with 50 VA
MM-CVT101-0
RS-232/RS-485 Converter for
N2 Download/Commissioning
with HVAC PRO Software
N/A
P32 Series
Air Flow Switch
N/A
TE-6001-961
Momentary Button Kit for
Temporary Occupancy or
Boost Modes
(for TE-6100-11, 12 only)
N/A
WS-WINPRO-0
HVAC PRO Software
N/A
WS-WINPRO-6
HVAC PRO Software
Upgrade
N/A
Y65XX-X Series
Transformer
24/120/220/277-480 VAC
to 24 VAC
* The AS-ZTU100-1 supports the AS-UNT11xx-0, AS-UNTxxx-0, AS-UNTxxx-1, and
AS-UNTxxx-2 models. The AS-ZTU100-0 supports AS-UNTxxx-0 models only.
Ordering the UNT1100 Series
7-5
Ordering Information for Outside Vendors
The following tables list preconfigured cables and cable components
available from CSC Southwest Wire and Windy City Wire.
CSC Southwest Wire
Use Table 7-5 to order preconfigured cables from CSC Southwest
Wire.
Table 7-5: Preconfigured Cables, CSC Southwest Wire
Description
Cable Length
Part Number
RJ45 Straight-through Cable
Assembly Plenum
7.62m (25 ft)
CBL-STAT25-SW
• Non keyed plugs
15.24m (50 ft)
CBL-STAT50-SW
• 24 AWG
22.86m (75 ft)
CBL-STAT75-SW
• 8 Conductor
30.48m (100 ft)
CBL-STAT100-SW
• Solid Wire
Use Table 7-6 to order cable components available from CSC
Southwest Wire for creating your own cables.
Table 7-6: Cable Components, CSC Southwest Wire
Description
Part Number
304.8m (1000 ft) Roll of Plenum Rated
CBL-24/NAT-SW
• 24 AWG
• 8 Conductor
• Solid Wire
RJ45 Modular Plugs (100 pcs)
S100710
Economy Crimp Tool
S104012
Premium Crimp Tool
S104015
Twisted Pair Easy Strip Tool
S104020
7-6
UNT Controller
Windy City Wire
Use Table 7-7 to order preconfigured cables from Windy City Wire.
Table 7-7: Preconfigured Cables, Windy City Wire
Description
Cable Length
Part Number
RJ45 Straight-through Cable
Assembly Plenum
7.62m (25 ft)
CBL-STAT25-WC
• Non keyed plugs
15.24m (50 ft)
CBL-STAT50-WC
• 24 AWG
22.86m (75 ft)
CBL-STAT75-WC
• 8 Conductor
30.48m (100 ft)
CBL-STAT100-WC
• Solid Wire
Use Table 7-8 to order cable components available from Windy City
Wire for creating your own cables.
Table 7-8: Cable Components, Windy City Wire
Description
Part Number
304.8m (1000 ft) Roll of Plenum Rated
CBL-24/8STAT-WC
• 24 AWG
• 8 Conductor
• Solid Wire
RJ45 Modular Plugs
S100710
Premium/Economy Crimp Tool
S104012
Twisted Pair Easy Strip
S104020
Ordering the UNT1100 Series
Specifications
Table 7-9: Specifications
Product
AS-UNT1108-0
AS-UNT1126-0
AS-UNT1144-0
Power Requirements
24 VAC, 50/60 Hz at 40 VA (per typical system),
8 VA for controller alone with comm module.
Ambient Operating
Conditions
-40 to 60°C (-40 to 140°F)
10 to 90% RH
Ambient Storage
Conditions
-40 to 70°C (-40 to 158°F)
10 to 90% RH
Dimensions (H x W x D)
160 x 146 x 39 mm (6.3 x 5.8 x 1.5 in.) without
enclosure (ENC)
Shipping Weight
0.43 kg (0.95 lb)
Processor
80C652
Memory
32K RAM
64K ROM
24K EEPROM
Interfaces
Zone Bus, N2
Standards Compliance
IEEE 472
IEEE 518
IEEE 587 Category A
FCC Part 15, Subpart J, Class A
UL 916
UL 864
Agency Listings
UL 864 Listed
7-7
7-8
UNT Controller
Application Specific Controllers Technical Manual
A-1
Appendix A
Application Examples
Introduction
All examples in this appendix were created by answering
configuration questions using HVAC PRO software to identify
terminal locations of the inputs and outputs.
Note:
Default answers are accepted for configuration questions not
included in this appendix.
Refer to the HVAC PRO User’s Manual (FAN 637.5) for detailed
information regarding controller configuration. The UNT1100 series
controller was used in all examples. Refer to UNT Applications
Application Note (LIT-6375100) for additional examples and
configuration information.
This appendix describes the following applications:
©
•
fan coil
•
unit vent
•
packaged rooftop
•
heat pump
•
lead/lag pump sequence
January, 2001 Johnson Controls, Inc.
Code No. LIT-63630838
www.johnsoncontrols.com
A-2
UNT Controller
Key Concepts
Fan Coil
Table A-1 lists the selections made through HVAC PRO software for
the example in Figure A-1.
Table A-1: Fan Coil Parameters and Configuration
Selections
HVAC PRO Parameters
Configuration Selections
Heating Type
Two-Pipe Common Htg/Clg Coil
(Prop)
Lighting Integration
Yes
Return Air
Discharge Air
VA 1
R1
C1
TE 1
fcmech
Figure A-1: Fan Coil Mechanical Flow Diagram
Application Examples
A-3
24 VAC
VA1
R1
Lighting
Relay
1 AC
2 COM
3 IN+
ON
COM
OFF
Fan
Relay
IN
24 VAC
XFR50
BO OUT
Jumper
Options
SRC
24 VAC
OPEN
SRC to COM Jumper
Low Side Switched
N2 Address
N 2+
N 2R ef
Job Information
RECV
XMIT
1
2
4
8
16
32
64
128
AI Switches
120 VAC
1 23 45 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
TE1*
Room
Sensor
ON
1 2 3
* Preferred DIP Switch Position for
TE-6700 Room Sensor
fcwire
Figure A-2: Fan Coil Wiring Example
Bill of Materials
Table A-2: Fan Coil Bill of Materials
Component
Part Number
C1
Digital Controller
AS-UNT11xx-0
TE1
Zone Temperature Sensor
TE-6700 Series
VA1 Valve Actuator
VA-8052 Valve Actuator Assembly
R1
GE-RR7
Lighting Relay
A-4
UNT Controller
Unit Vent
Table A-3 lists the selections made through HVAC PRO software for
the example in Figure A-3.
Table A-3: Unit Vent Parameters and Configuration
Selections
HVAC PRO Parameters
Configuration Selections
Control Cycle
ASHRAE Cycle 2
Economizer Changeover
Dry Bulb
Heating Type
Proportional
Unoccupied Override of Heating Valve
Heating Valve Fixed Position on
Low DAT
Cooling Type
None
Lighting Integration
No
Return Air
Discharge Air
Outdoor Air
EP1
TE
3
DA
TE
2
1
C
1
TE
1
uvmech
Figure A-3: Unit Vent Mechanical Flow Diagram
Application Examples
A-5
S
20
DA1
Fan
Relay
EP1
+
COM
T1
T2
COM
PNEUM
IN
BUS
COM
XFR50
BO OUT
Jumper
Options
SRC
24
VAC
OPEN
N2 Address
N 2+
N 2R ef
Job Information
SRC to 24 VAC BOs
High Side Switched
RECV XMIT
1
2
4
8
16
32
64
128
AI Switches
240
VAC
1 2 3 4 5 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
TE2
TE1*
TE3
RM-SP
ON
1 2 3
* Preferred DIP Switch Position for
TE-6700 Room Sensor
uvwire
Figure A-4: Unit Vent Wiring Example
Bill of Materials
Table A-4: Unit Vent Bill of Materials
Component Description
Part Number
C1
Digital Controller
AS-UNT11xx-0
TE1
Zone Temperature Sensor
TE-6700 Series
TE2
Outdoor Air Sensor
TE-6300 Series
TE3
Discharge Air Sensor
TE-6300 Series
EP1
Electric to Pneumatic Interface
EP-8000 Series
DA1 Zone Damper Actuator
*
Set AO2 to Zone Bus.
M100CGA-2*
A-6
UNT Controller
Packaged Rooftop
Table A-5 lists the selections made through HVAC PRO software for
the example in Figure A-5. We recommend that packaged rooftop
applications have separate transformers for controller and loads.
Sharing of transformers for controller and loads for packaged rooftop
wiring is not recommended.
Table A-5: Packaged Rooftop Parameters and
Configuration Selections
HVAC PRO Parameters
Configuration Selections
Economizer Output Type
Zone Bus Output (Address 22)
Economizer Changeover Type
Dry Bulb
Heating Type
Two Stages
Cooling Type
Two Stages
Outdoor Air Lockout of Heating/Cooling
Yes
Zone Reset from Humidity
No
Heating/Cooling Diagnostics
Yes
Lighting Interface
No
Air Flow Interlock
Yes
Exhaust Air
DA 1
Return Air
Airflow
Switch
H H C
T T L
G G G
1 2 1
Outdoor Air
TE 3
C
L
G
2
Discharge Air
S1
TE 2
C1
TE1
prmech
Figure A-5: Packaged Rooftop Mechanical Flow Diagram
Application Examples
DA1
A-7
XFR50
T2
BUS
24 VAC
T1
COM
120 VAC
Unit Terminal Strip
Y2 = Cooling-Stage 2
Y1 = Cooling-Stage 1
W2 = Heat-Stage 2
W1 = Heat-Stage 1
G = Indoor Blower
R = Equipment 24 VAC
B = Equipment Ground
Y2
Y1
W2
W1
G
R
B
XFR50
BO OUT
Jumper
Options
SRC
24 VAC
OPEN
N2 Address
N 2+
N 2R ef
Job Information
SRC Jumper Removed
RECV XMIT
1
2
4
8
16
32
64
128
AI Switches
120 VAC
1 2 3 45 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
TE2
TE3
ON
1 2 3
TE1*
Room
Sensor
S1
R
Y
B
* Preferred DIP Switch Position for
TE-6700 Room Sensor
prwire
Figure A-6: Packaged Rooftop Wiring Example with
Separate Transformers for Controller and Loads
A-8
UNT Controller
Bill of Materials
Table A-6: Packaged Rooftop Bill of Materials
Component
Part Number
C1
Digital Controller
AS-UNT11xx-0
TE1
Zone Temperature Sensor
TE-6700 Series
TE2
Discharge Air Sensor
TE-6300 Series
TE3
Outdoor Air Sensor
TE-6300 Series
S1
Air Flow Switch
P32 Series
DA1 Damper Actuator
M110CGA-2
For more information on rooftop installations, refer to Appendix B
Precautions for Rooftop Installations6363081apndxaenviron in this
user’s guide.
Heat Pump
Table A-7 lists the selections made through HVAC PRO software for
the example in Figure A-7.
Table A-7: Heat Pump Parameters and Configuration
Selections
HVAC PRO Parameters
Configuration Selections
Heat Pump Type
Water to Air
Reversing Valve Action
On for Heating
Supplemental Heat
Two Stages
Lighting Integration
No
Return Air
COMP1
H H
T T
G G
1 2
Discharge Air
R1
C1
TE1
hpmech
Figure A-7: Heat Pump Mechanical Flow Diagram
Application Examples
A-9
XFR50
24 VAC
120 VAC
Unit Terminal Strip
W2 = Heating-Stage 2
W1 = Heating-Stage 1
W = Reversing Valve
Y = Compressor
G = Indoor Blower
R = Equipment 24 VAC
B = Equipment Ground
W2
W1
W
Y
G
R
B
BO OUT
Jumper
Options
SRC
OPEN
SRC to 24 VAC Jumper
N2 Address
N 2+
N 2R ef
Job Information
RECV XMIT
1
2
4
8
16
32
64
128
AI Switches
1 2 3 45 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
TE1*
RM-T
RM-SP
ON
1 2 3
* Preferred DIP Switch Position for
TE-6700 Room Sensor
hpwire
Figure A-8: Heat Pump and External Transformer Wiring Example
Bill of Materials
Table A-8: Heat Pump Bill of Materials
Component
Part Number
C1
Digital Controller
AS-UNT1108-0 or AS-UNT1126-0
TE1
Zone Temperature Sensor
TE-6700 Series
A-10
UNT Controller
Lead/Lag Pump Sequence
Table A-9 lists the selections made through HVAC PRO software for
the example in Figure A-9.
Table A-9: Lead/Lag Pump Sequence Parameters and
Configuration Selections
HVAC PRO Parameters
Configuration Selections
Pump Enable Strategy
Binary Input
Lead Pump Selection
Hardware
Pump Status Monitoring
Common
Alarm Output Types
Hardware
Type of Hardware Alarm
Common
R1
Pump A
Return
Water
Discharge
Water
FS1
R2
Alarm
Relay
R3
C1
Pump B
S1
Enable Switch
Lead Pump Switch
S2
Figure A-9: Lead/Lag Pump Sequence
Mechanical Flow Diagram
llmech
Application Examples
Alarm
Relay
IN
24
VAC
Pump B
Relay
IN
24
VAC
A-11
Pump A
Relay
IN
24
VAC
XFR50
BO OUT
Jumper
Options
24
VAC
SRC
120
VAC
OPEN
N2 Address
N 2+
N 2R ef
Job Information
SRC to COM Jumper
RECV XMIT
1
2
4
8
16
32
64
128
AI Switches
1 2 3 45 6 7 8
OPEN
(UP)
ADDR 0 = ALL OPEN
RY10029 Rev J
S1
Enable
Switch
Flow
Switch
FS1
S2
Lead Pump
Switch
llwire
Figure A-10: Lead/Lag Pump Sequence Wiring Example
Bill of Materials
Table A-10: Lead/Lag Pump Sequence Bill of Materials
Component
Part Number
C1
Digital Controller
AS-UNT11xx-0
FS1
Flow Switch
Paddle Flow Switch
S1
Toggle Switch
Toggle Switch
S2
Toggle Switch
Toggle Switch
R1
Relay
Relay
R2
Relay
Relay
R3
Relay
Relay
A-12
UNT Controller
Application Specific Controllers Technical Manual
B-1
Appendix B
Precautions for Rooftop
Installations
Introduction
This appendix includes information about precautions for installing the
UNT1100 Series controller on a rooftop. It also describes how to
install a UNT1100 in a rooftop unit.
©
January, 2001 Johnson Controls, Inc.
Code No. LIT-63630839
www.johnsoncontrols.com
B-2
UNT Controller
Key Concepts
Environmental Information
Mount the UNT within the rooftop unit or some other enclosure to
protect it from rain, snow, etc. We recommend venting for small
enclosures in environments that regularly exceed 32°C (90°F). The
installation site of the UNT must meet the following environmental
standards:
•
The atmosphere must be free of explosive gases, or
corrosive chemical or salt vapors.
•
The relative humidity (non-condensing) must be between
10 and 90%.
•
The temperature for the UNT1100 controllers must be between
-40 and 70°C (-40 and 158°F).
The UNT1100 series controllers have conformally coated circuit
assemblies.
Electrical Noise in Rooftop Units
Rooftop air handling units may be very noisy from an electrical
standpoint. This is due to contacts switching inductive loads and
electrical spark ignition devices. You must take precautions to prevent
electrical noise from causing false BO triggering, resetting of
controllers, or interference with any network communication.
There is wide noise variation in relays, contactors, and gas ignition
control devices. Electromagnetic fields can radiate from wires carrying
spark or coil current, as well as from the spark or contact arc itself.
Electromagnetic fields are also present around wires carrying power to
the ignition control. These are noisy wires.
Considerations for Gas Ignitions
When using Rooftop Units containing Gas Ignition Control
(see Figure B-1), keep the following things in mind.
•
You must filter any wires connected to the gas valves that you
route with other wires leaving the gas heating section. An
individual line filter can filter two wires, but it is acceptable to use
only half of it if you need to filter a single wire. Mount the filters
on the metal wall between the ignition chamber and the fan
chamber. We recommend the filters listed in Table B-1.
Precautions for Rooftop Installations
B-3
Table B-1: Recommended Filters
Vendor
Type
Newark Stock Number
Corcom
3VB1
81F4523
Corcom
3B1
81F4523
Corcom
3VK1
81F4542
Corcom
3K1
81F4542
Note:
These filters are all rated 3A, 120/250V, and are available from
Newark Electronics. These models are specified for derating with an
unbalanced load. No other models are authorized.
•
Keep the length of the high voltage wire from the ignition control
to the spark bundled, and as short as possible. Bundle the spark
wire to itself if it is too long. Keep the ignition control and the
UNT1100 as far apart as possible. Route the power wires to the
ignition control along the metal mounting surface.
•
Ensure that you physically separate the wires on the line side of the
filter from those on the load side of the filter. Route noisy wiring
so that its path is as short as possible, and always avoid routing
noisy wires close to quiet wires. We recommend a 30 cm (1 ft) or
greater separation between parallel noisy and quiet wires.
-
Never mount the UNT1100 in the same compartment as the
ignition device.
-
If you must install noisy wiring near quiet wiring, have the
wires cross at right angles and as far apart as possible. Route
both near the metal mounting surface.
Note:
For specific information regarding noisy and quiet wiring,
refer to the ASC and N2 Bus Networking and
Troubleshooting Guide Technical Bulletin (LIT-6363003)
in the Application Specific Controllers Technical Manual
(FAN 636.3).6363003toc
Y1
BO5 Normally Open
Figure B-1: UNT Directly Driving Loads
Unit
Transformer
B
Line
Contactor
Contactor
Contactor
N.C.
Test
Point
N.C.
Metal
Barrier
L
I
N
E
L
I
N
E
Chassis
Grounded
L
O
A
D
Line Filter
Chassis
Grounded
L
O
A
D
Line Filter
Short “Quiet” Wires
Between Filter
and Barrier
Relay
Coil
CS
Gas Heat Section
Note 1: You may mount the UNT and any pilot relay (if used) within the rooftop unit's wiring cabinet or externally.
Note 2: Depending on the rooftop unit, these "limit" switches may actually be temperature, pressure, or flow actuated switches.
Note 3: Limit switches depicted in this drawing may be different types (i.e., pressure, temperature, etc.) than those actually
used in your particular unit. In addition, a single switch shown here may represent multiple switches in series in your
unit. Do not bypass or void any safety or limit switches.
24 VAC
SRC
BO1 Normally Open
R
Load
W1
G
Normally Open
BO2
W2
BO3 Normally Open
BO4
Line
To Economizer
Y2
Normally Open
Out 8
Load
Added
Transformer
BO6 Normally Open
BO7
BO8
RTN
24 VAC
UNT
Wiring Cabinet
Rooftop Unit
Ignition Control
Relay
Contact
Stage 2
W2
2-Stage
Gas
Valve
Rtopa
Equipment Limit or
Safety Switches
Stage 1
W1
THS (24 VAC) Spark
Flame
Common
Sensing
MV
R1
B-4
UNT Controller
Precautions for Rooftop Installations
B-5
Considerations for Specific Rooftop Units
Take the following information into consideration for specific rooftop
units.
Lennox GCS16 Series Rooftop Units
For Lennox GCS16 series rooftop units, bypass the K25 blower/fan
delay relay (TDR) by disconnecting the K25 coil power wire. Lennox
provides K25 blower control for use with electromechanical
thermostats. The reason for disconnecting this when a UNT provides
the blower control functions is that the K25 causes unnecessary
contactor cycling. This creates additional electrical noise. On some
Lennox models, it may also cause blower fan dropout or cycling that
appears as abnormal operation to the customer. Lennox has authorized
bypassing K25 blower control when you use Johnson Controls UNTs.
York® Rooftop Units
UNT1100 controllers, when installed in rooftop units, may experience
nuisance resets. This is evidenced by numerous unexplained offline
conditions with durations of less than one minute. To alleviate this
situation in York rooftop units, bypass or disable the supply fan relay
according to the following procedure:
Notes:
These modifications apply only to those units described
below. Units built after the dates indicated have already been
modified by York and do not require this change.
The date of manufacture of York rooftop units can be
determined from the second and third digits of the serial
number, as shown in Table B-2.
•
On 3 to 6 ton units built before February 17, 1997, the K3 relay
must be disabled by disconnecting the wire that connects the time
delay relay contacts to the relay board. This is typically the
234/BLUE wire.
•
On 3 to 6 ton units built between February 17, 1997 and
May 30, 1997, York implemented a different relay interface board.
On this new relay board, the K5 relay must be bypassed by moving
the wire currently connected to the G terminal on the York relay
board to the A2 terminal.
•
On 7 to 25 ton units built before February 28, 1997, the K5
relay must be bypassed by moving the wire currently connected to
the G terminal on the York relay board to the A2 terminal.
B-6
UNT Controller
Table B-2: York Rooftop Unit Serial Number/Date
Conversion
Second Digit
Month
Third Digit
Year
A
1
A
92
B
2
B
93
C
3
C
94
D
4
D
95
E
5
E
96
F
6
F
97
G
7
G
98
H
8
H
99
K
9
K
00
L
10
L
01
M
11
N/A
N/A
N
12
N/A
N/A
Precautions for Rooftop Installations
B-7
Procedure Overview
Table B-3: Installing a UNT1100 in a Rooftop Unit
To Do This
Follow These Steps:
Install a UNT1100 in a Rooftop
Unit
Mount the controller inside the rooftop unit or
another enclosure. Install a transformer.
Isolate any especially noisy outputs with a pilot
relay.
B-8
UNT Controller
Detailed Procedures
Installing a UNT1100 in a Rooftop Unit
To install a UNT1100 in a rooftop unit:
1.
Mount the controller inside the rooftop unit or some other
enclosure to protect it from outside elements, such as rain or
snow.
2.
Install a transformer to provide 24 VAC power to the controller
and all the loads. We recommend using one of the following
transformer types:
Table B-4: Recommended Transformers
Transformer Type
Description
Johnson Controls Y65 Series
40 VA
120 VAC to 24 VAC
Johnson Controls AS-XFR050-0
50 VA
120 VAC to 24 VAC (insulated
windings, high noise immunity,
resettable breaker)
3.
You may drive rooftop unit contactor/relay loads directly
(see Figure B-1) if all of the following conditions exist:
•
Under normal operation, the UNT1100 binary outputs directly
drive all contactor/relay coils within the rooftop unit.
•
Individual BO loads exceed 10 mA.
•
Individual BO loads do not exceed two amperes, sealed
current.
•
The UNT and all its loads together draw less than the main
power transformer’s VA when mounted in a well-vented open
area.
Note:
Connect the UNT1100 binary outputs (relays) to the rooftop
unit terminal strip.
4.
Controls Group
507 E. Michigan Street
P.O. Box 423
Milwaukee, WI 53201
Power
If other than 24 VAC power must be switched, install pilot relays
for isolation between the controller and the rooftop unit
contactors/relays.
www.johnsoncontrols.com
FAN 636.3
Application Specific Controllers Technical Manual
Printed in U.S.A.